Buck regulator design isn t too difficult.
Solar charge controller raspberry pi.
I was able to make the raspberry pi communicate with the charge controller using the pymodbus library and a cheap usb to rs485 adapter.
A few years ago lukas fässler needed a solar charge controller and made his own which he has been improving ever since.
However the pi zero needs only 1 1 5a so make sure to adjust accordingly.
More information below.
These boards are designed with a lot of flexibility for you to innovate your design.
The charge controller is sold by multiple vendors such as ep solar sainsonic renogy etc.
The more popular raspberry pi 4 s supply is recommended to be at 5v 2 2 5a current.
Better to use µw with a small microcontroller.
I used one of these usb to rs485 adapters.
I still think you should email the manufacturer of the solar charge controller to be sure you have the correct pinout of the 8 pin rj45 socket and the specification for the output voltage.
Connecting the solar panel to the pi zero.
In this video i just quickly.
The design is now mature and the high efficiency mppt solar charger is.
Another thing you can do when you get another pi is to try a usb ttl serial adapter.
I think that a microcontroller is as is so often the case here a much better idea than using a pi.
Custom system built for raspberry pi to visualize your solar installation and control it via mqtt.
This is the ultimate solar panel controller for raspberry pi and arduino projects.
Look up the ucn2906 lead acid charge controller ic.
The pi consumes 5w or so and that is a lot of power to be wasting on a solar charge controller.
Most solar panels in the market today are 9v.
New solar panels on top of the project curacao box weatherrack in background.
I chose an old raspberry pi model a because it doesn t consume very much electricity and although it s under powered it can easily handle the 2 tasks of serial communication and web serving.
They re cheap and you can buy them anywhere.
A venus gx costs nearly 300 and a raspberry pi costs about 30.
Or more accurately firmware that emulates their color control gx venus gx monitoring devices and it runs on a raspberry pi.
They might not reply or they might say no but you should try.
